A barn find is a car that has sat unused for years, and a 1964 Impala SS is one of the most valuable ones you might discover

A barn find is a vehicle that has been stored, often outdoors or in an unheated structure, for months or years without regular use. The 1964 Impala SS is particularly significant because it was the first year Chevrolet offered the Super Sport package as a distinct model, making any example worth restoring—but only if you understand what sitting does to an engine, fuel system, and chassis. Before you turn the key or call a tow truck, you need to know what condition the car is actually in and what that means for your next steps.

The difference between a barn find that becomes a reliable classic and one that becomes an expensive parts car comes down to what you do in the first week. Starting the engine, driving it to a shop, or pressure-washing the undercarriage can cause thousands of dollars in additional damage. The safe approach is methodical: inspect first, document what you find, then plan the work based on what the car actually needs.

Key Takeaways

  • Never start a barn-find engine cold; fuel that has sat for years turns to varnish and can damage the fuel injectors and carburetor, and old oil can cause bearing wear in seconds.
  • Rust forms inside the fuel tank, radiator, and brake lines during storage, so a visual inspection of the undercarriage and fuel system tells you whether restoration is worth the cost.
  • A 1964 Impala SS with matching numbers (original engine, transmission, and rear axle) is worth significantly more than one with replacements, so document what you find before any work begins.
  • Brake fluid absorbs moisture over years of storage, making the brakes unsafe; do not drive the car until the entire brake system has been flushed and refilled.
  • Tires older than ten years lose structural integrity even if they look intact, so replace them before moving the car any distance.

Why You Should Not Start the Engine Yet

The first instinct when you find a classic car is to see if it runs. Resist that instinct. An engine that has sat for years accumulates problems you cannot see: the oil has oxidized and lost its ability to protect metal surfaces, the fuel has turned into a sticky varnish that clogs the carburetor and fuel lines, and moisture has collected inside the cylinders and crankcase. Turning the key forces that degraded oil to move, which can score the cylinder walls and damage the bearings in seconds.

The fuel system is the bigger threat. A 1964 Impala SS uses a carburetor, not fuel injection, which means old fuel can gum up the jets and float bowl. If you do manage to get the engine running on old fuel, you risk drawing varnish into the engine itself. The safe approach is to drain the fuel tank completely, have it cleaned or replaced, install a new fuel filter, and flush the fuel lines before you even think about starting it. This takes a few hours and costs far less than rebuilding an engine that has been damaged by old fuel.

Inspecting the Undercarriage and Structural Rust

Rust is the real enemy of a barn find. Water collects in the lowest points of the car—the floor pans, the frame rails, the inside of the doors, and the trunk—and eats through steel from the inside out. A 1964 Impala SS with surface rust on the undercarriage can often be saved, but rust that has eaten through the frame or floor pans means the car is structurally unsafe and restoration costs jump dramatically.

Get under the car with a flashlight and a small hammer. Tap the frame rails, the floor pans, and the rocker panels (the metal between the front and rear wheels). If the hammer goes through, the rust is deep. If it bounces back with a solid sound, the metal is still there. Check the inside of the fuel tank by looking through the filler neck; if you see heavy rust or sediment, the tank will need to be cleaned or replaced. Inspect the brake lines for corrosion and pinhole leaks, because brake fluid absorbs moisture over time and can cause the lines to fail. Take photos of any rust you find; these will help a restorer give you an accurate estimate of what the work will cost.

Matching Numbers and Documentation

Before you do any work, photograph and document the engine block, transmission, and rear axle. A 1964 Impala SS with matching numbers—meaning the original engine, transmission, and rear axle are still in the car—is worth substantially more to collectors than one with replacements. The engine block number is stamped on the passenger side of the block near the cylinder head. The transmission number is on a tag bolted to the case. The rear axle code is stamped on the housing.

Write down these numbers and take photos of each one. If you plan to restore the car, a professional restorer or a local classic Chevrolet club can help you decode these numbers and tell you what options the car originally had. This information affects the value of the finished car and guides decisions about what parts to use during restoration. A mismatched car can still be beautiful and fun to drive, but it will never be worth as much as one with original components. Keep these photos and notes in a safe place; they become part of the car's history and documentation.

The Brake System and Tires Must Be Replaced Before Driving

Do not drive a barn find, even a short distance, on the original brakes and tires. Brake fluid is hygroscopic, meaning it absorbs moisture from the air. After years of storage, the fluid in a 1964 Impala SS brake system will contain water, which lowers the boiling point of the fluid and can cause brake failure when the brakes get hot. The entire system—master cylinder, wheel cylinders, lines, and fluid—must be flushed and refilled with fresh DOT 3 or DOT 4 fluid, depending on what the car originally used.

Tires older than ten years, even if they look intact and have tread, lose their structural integrity. The rubber hardens and becomes brittle, and the sidewalls can fail without warning, especially under the weight of a heavy classic car. Replace all four tires with new ones rated for the car's weight before you move it. If the car has been sitting for decades, the tires are almost certainly older than ten years, regardless of how they look. A blowout on the highway is not just expensive; it is dangerous, and it can damage the car further.

Fluids, Filters, and the Cooling System

Every fluid in the car needs to be replaced: engine oil, transmission fluid, coolant, and power steering fluid if the car has power steering. Old oil is no longer able to protect the engine, and old coolant loses its corrosion inhibitors, allowing rust to form inside the radiator and block. Drain the oil and refill it with the correct grade for the engine; a 1964 Impala SS typically uses 10W-30 or 10W-40, but check the owner's manual or a Chevrolet resource to be sure.

Flush the cooling system by running fresh water through it until the water runs clear, then fill it with a 50/50 mix of coolant and distilled water. Check the radiator for leaks and corrosion; if the core is heavily rusted or leaking, it will need to be recored or replaced. The water pump should be inspected for leaks and bearing play. If the car has been sitting for years, the water pump impeller may have corroded, so replacement is often the safest choice. These steps prevent overheating and internal rust damage once the engine finally runs.

Deciding Between a Full Restoration and a Driver Restoration

A full restoration of a 1964 Impala SS means taking the car down to bare metal, repainting it, rebuilding the engine and transmission, replacing all rubber and weatherstripping, and restoring the interior to original condition. This can take two to five years and cost anywhere from $30,000 to over $100,000, depending on the condition of the car and the quality of the work. A driver restoration means fixing what is broken, replacing what is unsafe, and making the car reliable enough to drive and enjoy without worrying about originality or show-quality results.

The condition of your barn find determines which path makes sense. If the car has solid metal, matching numbers, and a straight body, a full restoration may be worth the investment. If the floor pans are rusted through, the frame is bent, or the engine is seized, a driver restoration—or even parting the car out—may be the better choice. Talk to a classic car restorer or a local Chevrolet club before you commit to a path; they can give you a realistic estimate of what the car will cost to bring back to life and help you understand whether the investment will pay off in enjoyment or resale value.

Frequently Asked Questions

Can I tow a barn-find car with the wheels locked up?

No. If the wheels are locked or the brakes are stuck, towing will damage the tires and potentially the suspension. Have the car towed on a flatbed truck, not on a dolly or behind another vehicle. If the wheels do not roll freely, the brakes are likely seized, and they will need to be inspected and freed before the car moves.

What does "matching numbers" really mean for value?

Matching numbers means the original engine, transmission, and rear axle are still in the car. Collectors pay a premium for this because it proves the car is authentic and has not been modified. A 1964 Impala SS with matching numbers can be worth 20 to 40 percent more than the same car with a replacement engine, depending on the condition and rarity of the original components.

How do I know if the engine is seized?

Try to turn the crankshaft pulley by hand with a wrench. If it does not move at all, the engine is seized. Do not force it; you can break the crankshaft. A seized engine usually means the car has sat for a very long time, and the cost to free it up or rebuild it is substantial. A professional mechanic can assess whether it is worth the effort.

Should I pressure-wash the undercarriage before inspection?

No. Pressure washing can force water into seams and crevices, accelerating rust. Use a brush and a garden hose to gently rinse away loose dirt, then let the car dry completely before you inspect it. You want to see the rust as it is, not hide it under a layer of water.

What is the first thing I should do after towing the car home?

Park it in a dry location, preferably under cover. Do not start the engine. Photograph the entire car inside and out, document the numbers on the engine and transmission, and make a list of what you can see is broken or missing. This gives you a baseline for planning the restoration and helps you track progress as you work.